221212221221122 has 8 divisors (see below), whose sum is σ = 334919437736976. Its totient is φ = 109572408642132.

The previous prime is 221212221221083. The next prime is 221212221221143. The reversal of 221212221221122 is 221122122212122.

221212221221122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516850983948 + ... + 516850984375.

It is an arithmetic number, because the mean of its divisors is an integer number (41864929717122).

Almost surely, 2^{221212221221122} is an apocalyptic number.

221212221221122 is a deficient number, since it is larger than the sum of its proper divisors (113707216515854).

221212221221122 is a wasteful number, since it uses less digits than its factorization.

221212221221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033701968432.

The product of its digits is 1024, while the sum is 25.

Adding to 221212221221122 its reverse (221122122212122), we get a palindrome (442334343433244).

The spelling of 221212221221122 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".